The initial period of a pulsar is an important factor in our understandingof the formation of neutron stars and of the nature of the equation of state of neutro
小说教学应抓住"人物、情节、环境、叙述、虚构、主题"这六个关键词。小说的情节教学要解决四个问题:第一,明确什么叫小说的情节;第二,弄清小说情节结构的类型;第三,理解小说
For a composite system of gravitationally coupled stellar and gaseous discs, we have carried out a linear stability analysis for axisymmetric coplanar perturbat
A theoretical model for explaining the O'Connell effect of close binarystars is given based on the hypothesis that the circumstellar material of a binarysys
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<正>An atlas of high resolution (R = 60 000) CCD-spectra in the wavelength range 3500-5000A is presented for four objects in metallicity range -3.0 < [Fe/H] < -
自古以来,一代又一代文人墨客从三峡走过.他们从中汲取智慧,触发灵感,感悟人生,抒发情怀,留下了万千诗篇.它不仅构成了三峡美妙的人文景观,也为中国诗学的发展写下极其光辉的
Broadband afterglow observations provide a probe of the density structure of the circumburst medium. In the spreading jet model, prompt and intense X-ray/UV rad
王安石《游褒禅山记》是千古名篇,但从一般读者的阅读感受来看,此文寡淡之极,既无深刻的道理,也无优美的文辞,读来殊觉无味。然而古代评论家高度赞赏之,甚至推为“王集第一”
UV Tri was observed photometrically from 1999 to 2000 at the Xinglong Station of the National Astronomical Observatories, Chinese Academy of Sciences,and was al